Viking pump SG-04 SERIES Operating manual

TECHNICAL SERVICE
MANUAL
VIKING PUMP, INC. •A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
SECTION TSM 340
PAGE 1 OF 10
ISSUE H
D
D
S
S
INSTALLATION
CONTENTS
Installation ...................................................... 1
Mounting......................................................... 2
Start Up .......................................................... 3
Troubleshooting.............................................. 6
Miscellaneous................................................. 8
Do’s and Don’ts ............................................. 9
Warranty ....................................................... 10
General
The following items must be considered prior to pump installation:
1. Location - locate the pump as close as possible to the liquid supply. If possible locate the
pump below the liquid supply. Viking pumps are self-priming; but the better the suction
conditions, the better the pump will perform.
2. Accessibility – the pump must be accessible for inspection, maintenance and repair.
3. Suction/Discharge - SG Series pumps are designed for clockwise rotation as standard
(viewed from end of shaft). Refer to Figure 1.
4. Pressure Relief Valve - the SG Series is a positive displacement pump and requires some
form of over pressure protection. Without pressure protection, if the discharge line is
blocked or becomes closed, pressure will build up until the motor stalls, drive equipment
fails, a pump part breaks, or the piping and/or other equipment in the system bursts.
To prevent the possibility of any one or more of the above from occurring, the use of a
pressure relief valve is recommended.
5. Storage - drain the pump and apply a light coat of non-detergent SAE 30 weight oil to all
internal pump parts. Apply grease to the pump shaft extension. Viking suggests rotating
the pump shaft by hand one complete revolution every 30 days to circulate the oil.
FIGURE 1
INSTALLATION, START UP, TROUBLESHOOTING,
PREVENTIVE MAINTENANCE, DO’S & DON’TS
SERIES
SG-04, SG-05 & SG-07 SPUR GEAR PUMPS
Electronic copies of the most current TSM issue can be found on the Viking Pump website at www.vikingpump.com

SECTION TSM 340 ISSUE H PAGE 2 OF 10
MOUNTING
1. Surfaces to which the pump mounts must be clean and flat.
2. Use SAE Grade 5 or better capscrews to mount pump.
3. The 4 mounting capscrews for the SG-04 and SG-05 pumps must have a minimum of ½
inch thread engagement, and must be torqued evenly to 12-15 ft-lbs.
4. The 2 mounting capscrews for the SG-07 pumps must have a minimum of ½ inch
thread engagement, and be evenly torqued to 50-55 ft-lbs.
5. Standard SG Series pumps are designed to be used with jaw type couplings that do not
induce axial thrust on the pump shaft. If an improper type of coupling is used, internal
damage may result.
6. Do not strike or press the pump drive coupling to install. Internal pump damage will
result. If the coupling does not slide onto the shaft, inspect the coupling, shaft and
key for nicks or burrs and remove.
7. If the pump is to be belt or gear driven, the overhung load option must be specified.
8. Once the pump has been mounted and the coupling installed, it is recommended to put
lube oil into the suction port and turn the pump by hand to make sure it turns freely.
Alignment
Check alignment after mounting.
1. If the unit has a flexible coupling, remove any coupling guards or covers and check
alignment of coupling halves. A straight edge (piece of key stock will work) across the
coupling must rest evenly on both rims at the top, bottom and sides. See Figure 3.
2. Make a final check on alignment after the piping is hooked up.
USE STRAIGHT EDGE. THESE
SURFACES MUST
BE PARALLEL
CHECK WIDTH BETWEEN THESE SURFACES WITH INSIDE CALIPERS OR FEELER
GAUGE TO BE CERTAIN THE FACES ARE EQUAL DISTANCE APART AND PARALLEL.
FIGURE 3
Piping/Hose
The cause of many pumping problems can be traced to the suction piping. It should always be
as large in diameter and as short in length as possible.
Before starting the layout and installation of your piping system, consider the following points:
1. Never use piping smaller than the pump port connections. Piping larger in diameter than
the port connection is sometimes required to reduce friction losses.

SECTION TSM 340 ISSUE H PAGE 3 OF 10
2. Be sure the inside of the pipe is clean before installing.
3. When approaching an obstacle to the suction line, go around instead of over it. Going
over an obstacle can create an air pocket. Where practical, slope the piping so no air or
liquid pockets will be formed. Air pockets in the suction line make it hard for the pump to
prime.
4. A strainer on the suction side of the pump should always be considered in any pumping
system. The strainer will keep foreign matter from entering the pump. The strainer mesh
or perforation size should be large enough so that it does not cause excessive pressure
drop, but fine enough to protect the pump. Use of a strainer is particularly important at
start up to help clean the system of weld beads, pipe scale and other foreign objects.
5. A pressure relief valve is required in the discharge line. See Pressure Relief Valves,
General page 1 item 4.
6. The pump must not be used to support the piping. Hangers, supports, stands, etc. must
carry the weight of the pipes.
7. When fastening piping to the pump do not impose any strain on the pump casing.
“Springing” or “drawing” the piping up to the pump will cause distortion, possible
misalignment and probable rapid wear of the pump. Do not use the pump to correct errors
in piping layout or assembly.
8. All joints of piping system must be tight; liquid thread sealant will help assure leak free
threaded joints. Loose joints result in liquid leaks or suction side leaks. Air leaks make
the pump noisy and reduce flow. CAUTION: Be careful not to over tighten fittings as this
can cause cracked joints. Do not use PTFE tape. Reduced friction makes over tightening
very easy and will result in cracked ports. Leaks in the suction line can permit air to be
drawn in, and will cause a noisy pump and reduction in capacity.
9. Drive alignment must be checked after piping is hooked up.
10. Provide a pressure relief device in any part of a pump and piping system that can be
valved off and, thus, completely isolated. A rise in temperature will cause a liquid to
expand. If there is no provision for pressure relief in the closed off section, there is a
chance that the pump or piping will rupture.
Danger !
Before starting pump, be sure all drive equipment guards are in place.
Failure to properly mount guards may result in serious injury or death.
START UP
Before pushing “start” button, check the following:
1. Are vacuum and pressure gauges (liquid filled) mounted on or near the pump? Gauges
are the quickest and most accurate way of finding out what is happening in the pump.
2. Is the pump is correctly aligned with the drive equipment?
3. Make sure there is no pipe strain on the pump ports.
4. Rotate the pump shaft by hand to be sure it turns freely.

SECTION TSM 340 ISSUE H PAGE 4 OF 10
ITEM DESCRIPTION ITEM DESCRIPTION
1. Bracket, lipseal & bearing section 5. Relief valve kit
2. Match ground casing & (2) gears, driver &
driven shafts 6. Lipseal
3. Separation plate & bearing assy. 7. O-ring
4. Head and alignment sleeve assy. 8. Assembly capscrews
TYPICAL SG-04/SG-05
EXPLODED VIEW
TYPICAL SG-07
EXPLODED VIEW

SECTION TSM 340 ISSUE H PAGE 5 OF 10
5. Before connecting to the motor, jog it to be sure it is running in the correct direction.
Refer to “General” on page 1.
6. Is the pressure relief valve installed properly?
7. Make sure suction piping is properly connected and sealed, and valves are open.
8. Make sure the discharge piping is properly connected and sealed, valves are open,
and there is a place for the liquid to go.
9. Make sure all guards are in place.
10. The above checklist is a general guideline to be used prior to starting the pump. Since
Viking Pump cannot foresee every application for our product and possible system
design, the final responsibility is with the user. The pump must be utilized within the
catalog specifications and the pump system must be designed to provide safe working
conditions.
The “start” button may now be pushed.
The pump should begin to deliver liquid within 15 seconds! If not, push the stop button. Do not
run the pump without liquid flow longer than 30 seconds or the pump may be ruined.
Review Startup steps 1 through 10. Consider what the suction and discharge gauges may
indicate. If everything appears in order, re-prime pump. Refer to Mounting, page 2, item 8.
Push the “start” button. If nothing is flowing within 30 seconds, stop the pump. The pump is not
a compressor, it will not build up much air pressure. It may be necessary to vent discharge line
until liquid begins to flow.
If pump still does not deliver, consider one or more of the following:
1. The suction line has air leaks.
2. The end of the suction pipe is not submerged deeply enough in the liquid.
3. The suction lift is too great or the suction piping is too small.
4. Liquid is vaporizing in the suction line before it gets to the pump.
If after consideration of these points, the pump still does not deliver liquid, review all points
given under START UP and read through the TROUBLESHOOTING guide and try again. If
pump still will not deliver liquid, contact your Viking Pump supplier.

SECTION TSM 340 ISSUE H PAGE 6 OF 10
TROUBLESHOOTING
A Viking pump that is properly installed and maintained will give long satisfactory performance.
If trouble does develop, one of the first steps toward finding the difficulty is to install a vacuum
gauge in the suction line and a pressure gauge in the discharge line. Readings on these
gauges often give a clue on where to start looking for trouble.
DANGER !
Before opening any Viking pump liquid chamber (pumping chamber, res-
ervoir, relief valve adjusting cap fitting etc.) be sure:
1. That any pressure in chamber has been completely vented through
the suction or discharge lines or other appropriate openings or
connections.
2. That the driving means (motor, turbine, engine, etc.) has been
“locked out” or made non-operational so that it cannot be started
while work is being done on the pump.
3. That you know what liquid the pump has been handling and the
precautions necessary to safely handle the liquid. Obtain a material
safety data sheet (MSDS) for the liquid to be sure these precautions
are understood.
Failure to follow the above listed precautionary measures may result in
serious injury or death.
Vacuum Gauge - Suction Port
High vacuum reading would indicate:
1. The suction line is blocked, valve closed, a strainer is plugged or a pinched suction
line.
2. The suction line is too small.
3. The liquid is too viscous to flow through the piping.
4. The lift required is too high.
Low reading would indicate:
1. There may be an air leak in the suction line.
2. The end of the pipe is not in the liquid.
3. The pump is worn.
4. The pump is dry and should be primed.

SECTION TSM 340 ISSUE H PAGE 7 OF 10
Fluttery, jumping or erratic reading would indicate:
1. The liquid is vaporizing.
2. Liquid is coming in to the pump in slugs, possibly an air leak or insufficient liquid
above the end of the suction pipe.
3. Vibration from cavitation, misalignment, or damaged parts.
Pressure Gauge - Discharge Port
High reading would indicate:
1. High viscosity and small diameter and/or lengthy discharge line.
2. The strainer or filter is plugged.
3. The pressure relief valve is set too high.
4. Valve in the discharge line partially closed.
5. Line partially plugged from build up on inside of pump, solidified product or foreign
object.
6. Liquid in the pipe not up to temperature.
Low reading would indicate:
1. Pressure relief valve set too low.
2. Pressure relief valve poppet not seating properly.
3. Pump mounting capscrews into torqued to specifications (GP-04 and GP-05
Series 12-15 ft.-lbs.).
4. Pump assembly bolts not torqued into specifications (GP-07 Series 50-55 ft.- lbs.).
5. The bypass around pump partially open.
6. Pump is damaged or worn.
7. The pump has too much internal clearance.
Fluttery, jumping or erratic reading would indicate:
1. Cavitation.
2. Liquid is coming to the pump in slugs.
3. Air leak in the suction line.
4. Vibrating from misalignment or mechanical problems.

SECTION TSM 340 ISSUE H PAGE 8 OF 10
MISCELLANEOUS
Pump does not pump:
1. The pump has lost its prime from air leak or low level in tank.
2. The suction lift is too high.
3. Rotating in the wrong direction.
4. The motor does not come up to speed.
5. The strainer is clogged.
6. The bypass valve is open, pressure relief valve set too low or pressure relief valve poppet
stuck open.
7. The pump is worn out.
8. Any changes in liquid, system or operation that would help explain the trouble, e.g. new
liquid, additional lines or process changes.
Pump starts, then looses its prime:
1. The supply tank is empty.
2. The liquid is vaporizing in the suction line.
3. There is an air leak or air pockets in the suction line.
4. The pump is worn out.
Pump is noisy:
1. The pump is cavitating (liquid vaporizing in suction line) or being starved (heavy liquid
cannot get to pump fast enough). Increase the suction pipe size and/or reduce the length,
or decrease the pump speed. If the pump is above the liquid, raise the liquid level closer
to the center line of the inlet port. If the liquid is above the pump, increase the head of the
liquid.
2. Check alignment.
3. Anchor the base or piping to eliminate vibration.
Pump not delivering up to capacity:
1. The pump is starving or cavitating – see Pump is noisy, item 1.
2. The strainer partially clogged.
3. Air leak somewhere in the suction line.
4. Running too slow. Is the motor the correct speed and wired up correctly?
5. Pressure relief valve is set too low, stuck open or has damaged poppet seat.
6. The bypass line around the pump partially opened.
7. The pump is worn out.
Pump takes too much power (stalls motor):
1. The pump sequence valve set too high.
2. Liquid is more viscous than the is unit sized to handle.
3. The system pressure relief valve set too high.
4. The pump is misaligned.

SECTION TSM 340 ISSUE H PAGE 9 OF 10
DO’S AND DON’TS
Do’s and Don’ts for installation, operation and maintenance of Viking pumps to assure safe, long,
trouble free operation.
Installation:
1. DO install the pump as close to supply tank as possible.
2. DO leave working space around the pumping unit.
3. DO use large, short and straight suction port.
4. DO install a strainer in the suction line.
5. DO a double check of alignment after unit is mounted and piping is hooked up.
6. DO provide pressure relief valve for discharge side of pump.
7. DO check for proper rotation.
8. DO use a return line filter.
9. DO use an industrial grade hydraulic oil.
10. DO use piping, hose and fittings rated for maximum system pressure.
Operation
1. DON’T run the pump at speeds faster than 3600 RPM.
2. DON’T allow the pump to develop pressure higher than those shown in catalog at that
size.
3. DON’T operate pumps at temperatures above or below limits shown in catalog for
model.
4. DON’T operate unit without all guards in place.
5. DON’T operate pump without pressure relief valve in discharge piping; be sure valve is
mounted and set correctly.
6. DON’T stick fingers in ports of pump!!! Fingers may be pinched between gears.
7. DON’T work on the pump unless driver has been “locked out” so it cannot be started
while work is being done on the pump.
Maintenance:
1. DO record pump model number and serial number and file for further use.
2. DO have spare parts, pump or stand by units available, particularly if pump is
essential part of key operation process.
3. DO obtain, read and keep all maintenance instructions furnished with pump.
4. DO make sure any pump that has residual system pressure in it or that has
handled high vapor pressure liquids, has been vented through the suction or
discharge lines or other openings provided for this purpose.
5. DO make sure that if the pump is still hooked to the driver while maintenance
is being performed that the driver has been “locked out” so that it cannot be
inadvertently started while work is being done on the pump.
6. DO make sure any pump that has handled a corrosive, flammable, hot or toxic
liquid has been drained, flushed, vented and/or cooled before it is disassembled.

WARRANTY
Viking pumps, strainers and reducers are warranted to be
free of defects in material and workmanship under normal
conditions of use and service. The warranty period varies by
type of product. A Viking product that fails during its warranty
period under normal conditions of use and service due to a
defect in material or workmanship will be repaired or replaced
by Viking. At Viking’s sole option, Viking may refund (in cash
or by credit) the purchase price paid to it for a Viking product
(less a reasonable allowance for the period of use) in lieu of
repair or replacement of such Viking product. Viking’s warranty
is subject to certain restrictions, limitations, exclusions and
exceptions. A complete copy of Viking’s warranty, including
warranty periods and applicable restrictions, limitations,
exclusions and exceptions, is posted on Viking’s website
(www.vikingpump.com/warranty/warranty-info). A complete
copy of the warranty may also be obtained by contacting
Viking through regular mail at Viking Pump, Inc., 406 State
Street, Cedar Falls, Iowa 50613, USA.
THIS WARRANTY IS AND SHALL BE VIKING’S SOLE
AND EXCLUSIVE WARRANTY AND IS IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ALL WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NON-INFRINGMENT, ALL OF WHICH
OTHER WARRANTIES ARE EXPRESSLY EXCLUDED.
THE RIGHTS AND REMEDIES UNDER THIS WARRANTY
ARE AND SHALL BE THE SOLE AND EXCLUSIVE RIGHTS
AND REMEDIES AGAINST VIKING. EXCEPT FOR THE
SPECIFIC LIABILITIES AND OBLIGATIONS PROVIDED
UNDER THIS WARRANTY, VIKING SHALL HAVE NO
LIABILITY OR OBLIGATION WITH RESPECT TO ANY
PRODUCT CLAIMED TO BE DEFECTIVE IN ANY MANNER.
UNDER NO CIRCUMSTANCES SHALL VIKING BE
LIABLE UNDER THIS WARRANTY OR OTHERWISE FOR
SPECIAL, INCIDENTAL, INDIRECT, CONSEQUENTIAL OR
PUNITIVE DAMAGES OF ANY KIND, INCLUDING, BUT NOT
LIMITED TO, LOST OR UNREALIZED SALES, REVENUES,
PROFITS, INCOME, COST SAVINGS OR BUSINESS, LOST
OR UNREALIZED CONTRACTS, LOSS OF GOODWILL,
DAMAGE TO REPUTATION, LOSS OF PROPERTY, LOSS
OF INFORMATION OR DATA, LOSS OF PRODUCTION,
DOWNTIME, OR INCREASED COSTS, IN CONNECTION
WITH ANY PRODUCT, EVEN IF VIKING HAS BEEN ADVISED
OR PLACED ON NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES AND NOTWITHSTANDING THE FAILURE OF
ANY ESSENTIAL PURPOSE OF ANY PRODUCT.
© 12/2016 Viking Pump Inc. All rights reserved
TECHNICAL SERVICE
MANUAL
SECTION TSM 340
PAGE 10 OF 10
ISSUE H
INSTALLATION, START UP, TROUBLESHOOTING,
PREVENTIVE MAINTENANCE, DO’S & DON’TS
SERIES
SG-04, SG-05 & SG-07 SPUR GEAR PUMPS
VIKING PUMP, INC. •A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA